Knee pad



FIG. 1 is a front-and-left-side perspective view of a knee pad showing our new design;

FIG. 2 is a top end view thereof;

FIG. 3 is a bottom end view thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is front elevation thereof;

FIG. 6 is a left side elevation thereof; and,

FIG. 7 is a rear elevation thereof. 

The ornamental design for a knee pad, as shown and described. 